CONCRETE BLOCK FOR INNER EXCAVATION TYPE SHAFT CONSTRUCTION METHOD

PROBLEM TO BE SOLVED: To shorten connecting working of upper and lower concrete block and make registration sure by fixing a suitable number of box-like joint bolt- attaching fittings, a guide pipe for a knock pin and an anchor on a steel-made band, making a slot for a bolt insertion hole, and obliq...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	MATSUMURA TAKEFUMI
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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